Remove as much moisture as you can from the grated potatoes. You can use a salad spinner or squeeze them by the handful then wrap in paper towels. Just an FYI, in an effort to be more "green" I used a regular kitchen towel once and the brown stains never came out. The salad spinner works as well as anything.
Heat oil in a frying pan while you mix up the rest. Use enough to cover the bottom of the pan and be about 1/4" deep.
After removing as much liquid as possible, combine the potatoes with the other ingredients.
When the oil is hot, drop the potatoes by the large spoonful into the oil, pressing with a spatula to flatten a bit. Let fry until nicely browned on the bottom, then turn and cook the other side. Remove to a plate lined with paper towels.